Grinder for pigments and the like



-Nv.1s ,19ao. .EDERQMRES 1,781,808

aanmn ran rxemrs um THE LIKE rusa my 23. '192s s 'sheets-sheet 1 1N 5N l u eRozJares ii E ganeyd 7 jATTORNEY Nov. 18, 1930.

E. DE ROZIERES GRINDER FOR PIGMENTS ND THE LIKE Filed May 25. 1928 3 Sheets-Sheet 2 NVENTOR Eugene de ozleres 7 ATTORNEY Nov. 18, 1930. E. DE RozlERl-:s

GRINDER FOR PIGMENTS AND THE LIKE Filed lay 23, 1928 3 Sheets-Shut 5 @gene de l? Patented Nov. 18, 193i) l NTv .fol-FICE EUGENE DE RozIEnEs, or METUcHEN, NEW .inasm GENDER-FOR PIGMENTS AND THE LIKE Application med my 23, 192s. seran No. 280,101.

This invention 'relates to grinding machines o-f the type adapted to disperse agglomerates carried by a liquid or semi-liquid vehicle. My invention is particularly adapt- 5 ed to the grinding of paints, printing inks, pigments ground in water and other coloring or surfacing materials carried in oils, varnishes or other liquids. The present invention contemplates the provision of means l 4preferably in the form of rolls and actuated in part or wholly by the force of the stream of material for dispersing or grinding the material with thev consequent advantages which will appear hereinafter. My inven- 15 tion further contemplates the provision of simple and eicient means for adjusting the I fneness of the grinding and contemplates, further, an arrangement of the parts Whereby the material to be ground is stirred and 20 sheared at different points by forces acting in various directions, and whereby the operation of the grinding means maybe readily tested. l The various objects of my invention will appear as the description progresses, reference being had to the accompanying drawings, in which,

Fig. v1 is a vertical, substantially central section of my improved machine taken on the line 1--1 of Fig. 2.

Fig. 2is a vertical, longitudinal section of the same, taken on the line 2-2 .of.Fig. 1, and showing in diii'erenthalves thereof, a modified form of means for controlling the fineness of the grinding. Fig. 3 is a horizontal section of the same, taken on the line 3-3 of Fig. 2.

Fig. 4 is a vertical section of the same taken on the line 4-4 of Fig. 2.

Fig. 5 is a vertical, longitudinal section of a modified form of my improved machine, and

Fig. 6 is a similar View of another modification.

In the practical embodiment'of my invention which I have. illustrated by way`of example, the material is led to the machine through a suitable conduit as 10, and enters the pump chamber ll'throug'h the opening 12, said opening communicating with the conduit 10 as by means of the passage 13.

The main shaft 14 of the machine is suitably supported by means of anti-friction bearings 15 mounted inthe frame casting 16. Said shaft 14 may be 'driven by any suitable means not shown, such as a motor, a pulley or the like, from a suitable source of power not shown. Arranged in the chamber 11 is a suitable pump unit preferably of the rotary type, and in the form of a gear-pump unit or a centrifugal pump unit. As, illustrated, thereis keyed to the main shaft 14, the impeller or rotor 17 of a centrifugal pump, which includes the usual impeller blades 18, and which is preferably of the open face type@ so that' the blades serve to shear the material to be ground against the casing, frame or walls projecting therefrom'.1

It will be seen that on the rotation of the main shaft 14 at the proper speed and in the direction of the arrow 19 of Fig. 2, the material is drawn from the opening 12 into the pump chamber 11, and then is forced by the centrifugal pump just described or any other pump which is-used for that purpose, throughl the various outlets from the chamber in a well-known manner.

Referring particularly to Figs. 1 to 4 inclusive, the walls of the chamber 11 are suitably shaped so that the material acted on by the pump, instead of being ground completely within the chamber by the 'rotor to its finished state, is drawn with considerable ve locity, through outlet passage 20. Since both halves of the machine are substantially alike, a description of the passage 20 and of the grinding means in one half ofthe machine will suiice yfor both.

Attention is called, however, to Fig. 2, in which two modified forms of adjustment for the fineness of the grinding is shown in the ri ht and left half of the machine though it wl be understood that only the same type of adjustment is used in any one machine. The wall 21 ofthe outlet 20 is given the proper curvature, as will be understood by those skilled in the art, to offer a minimum resistance to the How of material out of the chamber 11, the roll 22 substantially closing the tact with said wall whereby-the grinding operation is aided.

Said roll 22 is mounted on theshaft 23 which, in turn,is supported by the stuliing box 24 arranged in the frame 16, suitable anti-friction bearings being provided, if desired, as is well understood. As illustrated in the left half of Fig. 2, between the frame 16 and the member 25 which forms the wall 21, is arranged the `adjusting block 26. Said block is suitably supported for movement within the frame 16 and slides on the inner walls 27 of said frame, portions 28 and 29 of said block being out away to offer a minimum resistance to the adjusting movement Inserted into said block for rotation therein, is the rotatable collar 31 secured by means of the pin to the adjusting screw 32 and rotatable therewith, said screw being operated in any suitable manner as by means of a hand wheel 33. 4

It will therefore be seen Ithat rotation of said hand wheel causesA movement of the adjusting block 26 toward or from the roll 22, as may be desired, thereby regulating and controlling the amount of space 34 between the arcuate wall 35 of the block 26 and the surface of the roll 22. A member as 36, preferably though not necessarily, integral with the frame 16, extends between the rolls 22 and 37 the upper and lower portions 38 and 39 of said memberbeing arranged as closely as possible to the respective rolls, and the inner wall 40 thereof forming one of the walls of the'chamber 11, while the outer wall 41 thereof-forms the inner wall of the passage 43 leading between the rolls 22 and 37, the inner wall 42 of the block 26 forming the outer wall of said passage 43.

The roll 37 is mounted on a shaft 44 similarly to the roll 22 and has a part of the surface thereof exposed in the chamber 11 between members 36 and 25 so that said ,roll may be operated by the stream of material-'pumped by the blades 18. On the rotation of the shaft 14, the material is thrown centrifugally into the outlet passages 20 and thereby stirred and sheared, and strikes the surfaceof the roll 22 and to a lesser extent, the surface of the roll 37 to cause rotation of said rolls un` der the impetus of the stream, or to aid the extraneous forces used for rotating the rolls, the material being again thereby subjected to shearing. The material then enters the passage 34 and is ground therein between the roll and the wall 35 and continues to pass with considerable velocity into the passage 43, and again subjected to shearing. The curved wall 41 limiting said passage, directs the maferial about the outside of the roll 37 whereby said roll is aided in its rotation by the stream of liquid which then passes through the space 45, where said material is again ground between the roll 37 and the wall 46 of the block 26, finally passing out through the discharge opening 47.

Itl will be seen that by the provision of the rolls 22 and 37 and the passages 34 and 45, I am able to obtain two-stage grinding opera-- tion whereby the agglomerate which is not fully dispersed or broken up by the first step of grinding is completely ground at the second stage. By adjusting the block 26 relatively to the rolls 22 and 37, the eective width of the passages 34 and 45 may be altered as desired and the lineness of the grindinfr accordingly controlled. l

llt will also be seen that each pair of rolls 22 and 37 is provided with a separate discharge passage whereby the grinding action of each pair of said rolls may be separately test-ed and the adjusting block 26 for that pair may be correspondingly shifted, as may be found necessary.

It will be understood that instead of depending entirely on the velocity of the stream of material acted on by the rotor 17 for the rotation of the rolls 22 and 37, said rolls may be positivel driven by means of suitable gearing. I such gearing is found to be desirable or advantageous, the gear 48 is keyed to the main shaft 14 and transmits its motion through the gears 49 and 50 and the roll shafts 23 and 44, respectively, the speed of rotation of the gears and the rolls driven thereby bcing properly adjusted as will be obvious to those skilled in the art.

As shown in the right half of Fig. 2, a separate adjust-ing block 126 is provided for each of the rolls 22 and 37. In this modification, the member 25 may form an integral extension from the casing or frame 16. Said block 126, however, is preferably adjusted radially of the roll by means similar to that described in connection with the block 26. It will be noted that where radially adjustable blocks are used, the spaces 34 and 45 are each of uniform width throughout, and said spaces may be independently adjusted. lt therefore becomes possible to obtain comparatively` coarse grinding at the first stage as by moans of theroll 22 and to obtain finishing or fin(` grinding at the second sta geby proper adj ustment of the roll 37.

In the modification illustrated in Fig. 5, the adjusting block 5l is also mounted for adjustment radially of the roll 5:2 whereby a grinding passage 53 is provided between the wall 54 of the adjusting block and the surface of the roll. Said passage 53 is of the same width throughout .at all times. irrespective or the position of the adjusting block. The member 55 projecting from the casing or frame 58 is so shaped that the inner wall 5G thereof guides the liquid drawn by the l locity and with a minimum amount of fric CTI tion.

' Referring again to Fig.- 5, I have there shown a one-stage grinding machine with the outlet passages 57 in theframe 58 suitably connected to the outlet passage 59. The inlet 60 communicates with the inlet 12 leading to the rotor chamber 11 in the manner heretofore described land which description need not therefore be repeated.

As illustrated iinFig. 46, IV have shown a number of cooperating rolls 61, arranged to substantially close the outlet passage 62 from I the rotor chamber 11so that material centrifugally pumped by the rotor 17 is delivered with suitable Velocity between the rolls l61 and is ground between said rolls andthe adj ustable block 63, whence the material passes into the discharge passage 64 and out through the outlet opening 65. If desired, the rolls/ may be spaced sufficiently close together to accomplish the greater part of the grinding therebetween. Furthermore, by means of a suitable gear connection to the rolls,.one of the rolls may be driven somewhat faster than the other to insure eiicient grinding action therebetween. v i

In either modication shown in Figs. 5 and 6, the rolls may be rotated entirely or partly by the moving-stream of material, 0r the rolls may be aided in their rotation by gearing, suitably connected to the main shaft 14, in a manner which will be obvious to those skilled in the art and hence, which neednot be fur- -ther described or illustrated.

It will be understood that the various shafts and stuiing boxes may be mounted on a suitable roll or ball bearings or other anti-friction bearings of any suitable type, that the frame of the machine may be cast integrally with the various walls thereof, forming the passages above described, that water jackets may be provided in the casing and for the rollers, if found desirable, and that the roll-- ers orthe grinding walls may be grooved, if desired, all of Which will be clearly understood by those skilled in the art.

It will be seen that I have provided an improved arrangement of means for stirring, shearing Qld grinding material at different points and to various Jredetermined linenesses, which means includes a roll 'operating againstan adjustable grinding surface and that the means may beso designed and arranged as to provide one-stage, two-stage or multiple grinding, as may be found advantageous. It will further be seen that I have provided a simple, compact and highly eicient grinding a paratus which may be further simpliied y the omission of gearing 'and a consequent substantial reduction in the consumption of power, if desired, and in whichk proper grinding is assured.

, I do not wish to be understood as limiting myself to the specific forms of my machine I illustrated herein .by way of example, since my invention may take many forms, but in-l tend yto claim my mvention as broadly as may be permitted by the terms of the appended claims and the state of the prior art.

I claim.:

1. In a grinder, a revoluble roll, meansfor forming a passage to said froll and a stationary block adjustable relatively'to said roll, and provided with a smooth arcuate surface vsubstantially continuous with and tangent to the adjacent party of the walls of said passa eand :substantiall parallel to the sur ace of thev roll, w ereby the grinding action takes place between said roll and said surfaceand the material advance/dv along the passage meets the roll in a direcchamber and obstructing the discharge ofv material into said discharge-passage, and an adjustable block cooperatin with said roll for grinding material there vetween.

3. In a centrifugal grinder, a centrifugal pump having a passage leading therefrom and a roll arranged in the pump at said passage to be operated by the stream of material delivered by said pump against said roll and cooperating with a wall of the passage to grind material therebetween.

4. In a grinder,a pump, and a roll adjacent the wall of the pump bstructing the vstream delivered by said pump and operated thereby and cooperating with said wall to grind material therebetween.

5. In a rotary grinder, a rotary pump, a roll arranged to be operated by the stream of material -delivered by said pum against said roll, and an adjustable grinding block cooperating with said roll for `grinding the material therebetween.

Uhl

lll)

. 6. In a grinder, a pump having an outlet passage therein and means arranged in said passage and in the Interior of the pump and actuated in part by the material delivered by said pump through said passage for grinding the material passing' through said passa e. In a centrifugal grinder,- a centrifugal l pump having an outlet passage therem, rev- 8. In a centrifu al pump, .spaced continuously revoluble ro ls, and-adjustable arcuate surfaces adjacent said rolls shaped to provide a passage between said rolls for the flow of material, said surfaces cooperatin with said rolls for providing two stages o grinding.

9. In a centrifugal pump having an outlet passage therein and a continuously revoluble roll arranged in said passage and independent of said pump, and serving as a grinding element, and a stationary arcuate surface adjacent the surface of said roll and adjustable relatively thereto and shaped to conform thereto, serving as the other' grind ing element in cooperation with said roll and receiving material delivered by said pump'in a direction substantially tangent to the leading edge thereof.

10. In a grinder, a pair of cooperating grinding rolls, and a pump having a passage leading to said rolls, whereby said rolls are urged to rotate by the stream delivered thereto by the pump.

. 11. In a centrifugal grinder, a casing having a pump chamber therein, a rotor provided with curved blades revolubly mounted in said chamber, an inlet conduit to said chamber, member projecting from said casing and provided with curved walls leading from said chamber and substantially tangential thereto, a revoluble roll adjacent each of said walls and forming a discharge passage therebetween, and an adjustable block having an arcuate surface adjacent said roll and providing an adjustable passage for material delivered by the pump, between said surface and the roll.

12. In a centrifugal grinder, a centrifugal pump, a rotor for said pump, a stationary member having a Wall leading from said pump for guiding material away from the pump, a revoluble roll adjacent the wall and arranged in the path of the stream of material delivered by the pump,

a second revoluble wall spaced from the first-mentioned roll, a second stationary member between said rolls and forming a passage therebetween for directing material from the first to the second roll, and means providing a guiding surface for eachlfoll spaced apart by said passage for adjusting the neness of the grinding action of each roll.

13. In a centrifugal grinder, a centrifugal Y pump provided with an outlet passage, a pair shaft in the casing,

ously revoluble means arranged in said passage for operating upon and being revolved by the stream of material delivered by the pump, and means cooperating with the revoluble means and independent of the pump for grinding the material passing through said passage.

15. In a -rotary grinder, a casing, a main a centrifugal rotor on said shaft, a pump chamber surrounding the rotor and having walls within the casing and means independent of said rotor and including a relatively stationary part and a relatively movable part forming part of the wall of the chamber for grinding the material delivered by said rotor.

16. In a grinder, a centrifugal pump, a revoluble roll operative independentl of said pump and disposed adjacent a wal thereof, and an arcuate grindin surfaceadjustable relatively to said roll for determinin the ineness of the grinding operation, sai surface being arranged in a direction to receive the material delivered thereto by said pump tangent to the leading extremity thereof.

17. In a pump, a revoluble roll carried thereby, and revoluble means within the pump for delivering a stream of material tangent to the cylindrical surface of said roll, and means including an arcuate grinding surface cooperating with said roll for adj usting the space therebetween, the ends of said surface being substantially aligned with the ends of said revoluble means.

18. A centrifugal pump including aV casing,

walls for directing the ilow of material arranged within and spaced inwardly' from the interior Walls of the casing, a stationary block provided with an arcuate grinding surface, and cooperating with the directing walls for directing the iow of material, a disintegrating roll cooperating with said surface and arranged concentrically therewith, and means for relatively adjusting said block and said roll radially. f

19. In a pump, a grinding roll arranged in the interior thereof and adapted to have material directed tangentially thereagainst by the pump, and a relatively adjustable grinding surface adjacent the outer part of the roll.

20. A" rotary pump adapted to stir and shear the material to be ground and having a substantially tangential outlet passage therefrom, and a. continuously revoluble member in the pump obstructing said passage and receiving material from the pump directly against its revolving surfe ce and serving to further stir and shear the material and relatively adjustable means cooperating with the member for -further grinding the material. j

21. In a grinder, a casing, pump chamber walls arranged interiorly of said casing, a centrifugal pump within said Walls, a revand in said casing, and means for adjusting roll adjacent at least one of said walls and forming a discharge passage therewith, anv

arcuate surfacein the interior of said casing and concentric with an outer partof said roll, and means for relatively adjusting said surface and said roll for providing an adjustable passage for material delivered by the pump.

23. In a centrifugal grinder, a casing, a centrifugal pump arranged in the interior of and substantially coaxially with said casing, a stationary member carried by said casing and provided with a wall leading from said pump for guiding material outwardly of the pump, a revoluble roll adjacent the wall and arranged in'the path ofthe stream of material delivered by the pump for receiving material substantially tangentially to the surfacethereof, and means providingja cooperating grinding surface for the roll, said means and said roll being relatively adjustable for adjusting the fineness of the grinding action of said roll, and said means being arranged in the interior of said casing.

24. In acentrifugal grinder, acasing, a centrifugal pum within said casing and provided with a co xially arranged inlet opening, members carried by said casing in the interior thereof and having walls providing an outward passage for material delivered by said pump, a revoluble roll in the pump and forming part of said passage, and a member provided with an arcuate surface arranged the interior of the casing and cooperating 'therewith to grind material.

27..In acentrifugal grinder, a casing, a centrifugal pump, said pump having an outlet passage extending therefrom, a pair of vrolls arranged at said passage adjacent the pump and cooperating to grind material therebetween, and a member provided with an arcuate surface arranged adjacent to and concentric with at least one of said rolls, and means accessible exteriorly ofthe casing for relatively adjusting said surface and its cooperating roll. l

U 28. A combined pump and grinder having 'interior walls therein, a revoluble grinding roll in the interior of the pump adjacent said walls and operatedby the stream of liquid directed against the roll' by the pump and cooperating with an adjacent part of said Walls for grinding material therebetween.

29.. A combined ump and grinder having interior circum erential walls surrounding an interior pump chamber' and having end walls at the ends of said chamber, pum ing means. in the chamber, and revolub e means adjacent the cireuinferential walls forming part of the pump, and coo eratingA with the adjacent part of the circum erential walls for grinding material directed against said means by thel pump, said means 'being arranged between saidend walls.

. EUGENE DE ROZIERES.

outwardly of and concentric with said roll said roll and-said member relatively to each other.

25. In a centrifugal grinder, a casing, a centrifugal pump in the interior of said c asing having an inlet conduit for Athe reception of material coaxially of said pump, a revoluble roll iii said casing adjacent said pump, and an arcuate surface in said casing and concentric with said roll, said surface and said roll being relatively adjustable.

26. In a centrifugal grinder, a casing, a

centrifugal pump includin a 'single revolu-.

ble member, said pum having an outlet passage therein, a pair o rolls arranged at said passage adjacent the pump and cooperating to grind material therebetween, anda member provided with anarcuate surface arranged adjacent at least one of said rolls in 

